Having trouble deleting a page layout because it's still being referenced?

I see this question asked on a daily basis by many people; “I’m trying to delete my page layout but it keeps telling me it’s still referenced — I swear it’s not!!! what’s wrong?”.

Well, yes, it’s quite likely still being referenced, however … Andrew Connell has been kind enough to share an invaluable tip on finding all related resources, including the pages using the layout you swear are not!